Stoker-furnace



J. E. WAGONER.

STOKER FURNACE. APPLICATION FILED NOV. 19, 1919.

Patented Apr. 5, 1921.

1712/62: for

JEWayaner UNITED STATES PATENT OFFICE.

\TUJDSON E. WAGONER, OF MONONGAHELA, PENNSYLVANIA, ASSIGNOB TO COMBUS-'I'ION ENGINEERING CORPORATION, OF NEW YORK, 11'. Y., A GORPORATION 018NEW YORK.

STOKER-FURNAGE.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application filed. November 19, 1919. Serial No. 339,118.

To all whom it may concern:

Be it known that I, J UDSON E. WAGONER, a citizen of the United States,residing at Monongahela, county of Washington, State of Pennsylvania,have invented a certain new and useful Improvement in Stoker- Furnaces,of which the following is a full, clear, and exact description.

My invention relates to improvements in stoker furnaces and has for itsobject to provide a stoker furnace having a movable grate ofconsiderable width fed locally by a means located at one portion thereofand means for distributing the fuel thus supplied transversely alongsaid grate. It further has for its object to provide a furnace havingsuch a pushing means located at a central portion of the furnace andmeans for distributing the fuel thus supplied in both directionstransversely of said grate.

The following is a description of an embodiment of my invention,reference being had to the accompanying drawings, in which- Figure 1shows a vertical longitudinal section of a stoker embodying myinvention, while Fig. 2 shows ahorizontal section of the same on theline 2-2, Fig. 1.

Referring more particularly to the drawings, 1 and 2 are respectivelymovable and stationary tubular grate bars of the general type shown inpatent to W. R. Wood, No. 818,010 dated April17, 1906, and constitutingthe upper section of an inclined Stoker grate. 1 and 2 are alsorespectively movable and stationary tubular grate bars constituting alower section of the grate. The bars are provided with inlet ports 3, 3'and outlet ports 4, a and the bars 1 and 1 are reciprocated byoscillating rocker bars 5, 5 having flanges engaging recesses inthebottoms of the movable bars. The bars are supported by a support 7 andwalls 6 and 8, which walls with partitions 9 and 10 form air chambers11, 12 andv 13 11 being a primary air chamber supplying air to theinlets 3-, 12 being a secondary air chamber receiving air fromv 1 andsupplying it to inlet 3 and also to fuel superimposed on the bars 1 and2, and13 being a tertiary air chamber receiving air fromtlie outletports at: supplying it to the fuel on the bars The sections abovereferred to are of considerable width and it is necessary to have fuelevenly distributed thereon from side to side. I accomplish this by myinvention by providing a passage 14 leading to a portion of the uppersection, preferably the central portion, and of less width than saidsection, into which passage a hopper 15 discharges. In this passage Iarrange a suitable pusher 16 here shown as a reciprocating pusher blockwhich as it reciprocates feeds fuel from the hopper to the upper ends ofthe inclined grate bars 1 and 2 down which it travels to and over thebars 1' and 2 on account of the movements of the bars 1, 1'. In order todistribute the fuel bed through the passage 14, I provide a,doubleconveyer having two worms 17 and 18, and means for rotating the sameclockwise (Fig. 1). One of these conve ers 17 has a righthand thread and18 has a left-hand thread so that when rotated clockwise they tend tomove fuel from the center in both directions. The conveyer is rotated bya ratchet wheel 19 which is actuated by a pawl 20 carried by a frame 21embracing the ratchet wheel and swinging on the shaft of the conveyer.This pawl 20 is pivoted at 22 and has a weighted end 23 which tends tohold it in engagement with the ratchet wheel. A detent 24 secured to theframe holds the ratchet wheel from reverse movement. The lower end ofthe frame 21 is provided with a series of holes to, any one of which alink 26 surrounding an eccentric 27 can be connectedso as to and 18. arerevolved to feed coal and the bars 1., 1' are reciprocated to cause itto move down the grate sections toward} the ash pit 3 1.

In order to reciprocate the pusher'block 16, I provide two gears 35, 35engaging gears on the shaft 28 and provided with crankpins 36, 36, whichare connected by links 37',

bars 1 and 2 to chamber 12, whence some of it flows through the uppersection to the fuel above, while the balance flows through the tubularbars of the lower section to the chamber 13 and thence to thesuperimposed fuel. The means for directing the air does not, however,form a part of my invention which consists in the feeding means inconjunction With a moving grate.

As will be evident to those skilled in the art, my invention-permits ofvarious modifications without departing from the spirit thereof or thescope of the appended claims.

What I claim is:

1. In a stoker furnace, the combination of a series ofinclined gratebars arranged adjacent to one another, some of which are movable, aretort adjacent to the upper ends of said bars and transverse to theaxes of said bars, a passage located at the central portion of saidretort for feeding fuel thereto, a hopper for fuel to be fed, means forfeeding fuel from said hopper through said passage to said retort, adouble spiral conveyer in the bottom of said retort for distributingfuel fed through said passage to both ends of said retort, and means foractuating said double conveyer.

2. In a stoker furnace, the combination of. a series of inclined gratebars arranged adjacent to one another, some of which are movable, aretort adjacent to the upper ends of said bars and transverse to theaxes of said bars, a passage located at the centralv portion of saidretort for feeding fuel thereto, a hopper for fuel to be fed, means forfeeding fuel through said passage to said retort, a double spiralconveyer in the bottom of said retort for distributing fuel fed. throughsaid iassage to both ends of said retort, centrally located means foractuating said double conveyer, and a bridge located in the centralportion of said retort housing said actuating means.

3. In a stoker furnace, the combination of a series of inclined gratebars arranged adjacent to one another, some of which are movable, aretort adjacent to the upper ends of said bars and transverse to theaxes of said-bars, a passage located at the central portion of saidretort for feeding fuel thereto, a hopper for fuel to be fed, feedingmeans for moving fuel through said passage to said retort, a doublespiral conveyer in the bottom of said retort for distributing fuel fedthrough said passage to both ends of said retort, means for actuatingsaid double conveyer, said actuating means consisting of a ratchet wheellocated at the central portion of said double conveyer, an oscillatingpawl for -actuating said ratchet wheel, a bridge located in the centralportion of said retort and housing said ratchet wheel and a shaft foroperating said feeding means and means operatively connected thereto foractuating said pawl.

4. In a stoker furnace, the combination of a series of inclined gratebars arranged adjacent to one another, some of which are movable, aretort adjacent to the upper ends of said bars and transverse to theaxes of said bars, a passage located at the central portion of saidretort for feeding fuel thereto, a hopper for fuel to be fed, feedingmeans for moving fuel through said passage to said retort, a doublespiral conveyer in the bottom of said retort for distributing fuel fedthrough said passage to both ends of said retort, means for actuat ingsaid double conveyer, a shaft and operative connections for operatingsaid feeding means, and an eccentric actuated thereby for reciprocatingsaid movable bars.

5. In a stoker furnace, the combination of. a series of inclined gratebars arranged adjacent to one another, some of which are ends of saidbars and transverse to the axes of said bars, a passage located at thecentral portion of said retort for feeding fuel thereto, a hopper forfuel to be fed, feed ing means for moving fuel through said passage tosaid retort, a double spiral conveyer in the bottom of said retort fordistributing fuel fed through said passage to both ends of said retort,meansfor actuating said double conveyer, said actuating means consistingof a ratchet wheel located at the central portion of said doubleconveyer, an oscillating pawl for actuating said ratchet wheel, a bridgelocated in the central portion of said retort and housing said ratchetwheel, and a shaft and operative connections for operating said feedinging means for moving fuel through said passage to said retort, a doublespiral conveyer in the bottom of said retort for distributing fuel fedthrough said passage to both ends of said retort, means for actuatingsaid double conveyer, a shaft and operative connections for operatingsaid feeding means, an eccentric actuated thereby for reciprocating saidmovable bars, a second series of grate bars extending beyond and 10receiving fuel from the first series, and means actuated by saideccentric for actuating the movable bars of said second series.

JUDSQN E. WAGONER.

